Single side damage simulations and detection in beam-like structures

11th International Conference on Damage Assessment of Structures

物理学;材料科学

Zhou, Yun-Lai^1 ; Wahab, M. Abdel^2 ; Perera, R.^1 ; Maia, N.^3 ; Sampaio, R.^3,4 ; Figueiredo, E.^5

Department of Mechanical Engineering, Technical University of Madrid, Jose Gutierrez Abascal 2, Madrid

28006, Spain^1

Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 903, Zwijnaarde

B-9052, Belgium^2

LAETA, IDMEC, University of Lisbon, Av. Rovisco Pais, Lisbon

1049-001, Portugal^3

Instituto Superior de Engenharia de Lisboa, Polytechnical Institute of Lisbon, 1 Rua Conselheiro Emidio Navarro, Lisbon

1959-007, Portugal^4

Faculdade de Engenharia da Universidade Lusófona, Campo Grande 376, Lisbon

1749-024, Portugal^5

关键词: Analytical results;    Beam-like structures;    Damage simulation;    Free-free beam;    Modal assurance criterion;    Real engineering;    Real structure;    Well performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/628/1/012036/pdf
DOI  :  10.1088/1742-6596/628/1/012036

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Beam-like structures are the most common components in real engineering, while single side damage is often encountered. In this study, a numerical analysis of single side damage in a free-free beam is analysed with three different finite element models; namely solid, shell and beam models for demonstrating their performance in simulating real structures. Similar to experiment, damage is introduced into one side of the beam, and natural frequencies are extracted from the simulations and compared with experimental and analytical results. Mode shapes are also analysed with modal assurance criterion. The results from simulations reveal a good performance of the three models in extracting natural frequencies, and solid model performs better than shell while shell model performs better than beam model under intact state. For damaged states, the natural frequencies captured from solid model show more sensitivity to damage severity than shell model and shell model performs similar to the beam model in distinguishing damage. The main contribution of this paper is to perform a comparison between three finite element models and experimental data as well as analytical solutions. The finite element results show a relatively well performance.